Question

6
multiple choice 5 points
which is the correct hyphen notations for the atom with 8 p+?
n - 7
hydrogen - 1
oxygen - 16
o - 8

Explanation:

Step1: Determine the element

The number of protons (\(p^+\)) determines the element. An atom with \(8\ p^+\) is oxygen (\(O\)) because the atomic number (\(Z\), which is equal to the number of protons) of oxygen is \(8\).

Step2: Analyze hyphen notation

The hyphen notation for an isotope is written as \(\text{Element}-\text{Mass Number}\). The mass number (\(A\)) is the sum of protons (\(p^+\)) and neutrons (\(n^0\)). For a neutral oxygen atom, the most common isotope has \(8\) protons and \(8\) neutrons. So, \(A=p^++n^0 = 8 + 8=16\).

Answer:

Oxygen - 16